Machine tool and attachments therefor



Feb. 19, 1935. I EKLIND 1,991,500

MACHINE TOOL AND ATTACHMENTS THEREFOR Filed April 6, 1952 sweets-sheet 1 v v I EQ'J' l4 IUW' Z Feb; 19, 1935. H. A. EKLIND 1,991,500

MACHINE TOOL AND ATTACHMENTS THEREFOR Filed Apr il 6, 1932 5 Sheets-Sheet 2 Feb. 19, 1935. H. A. EKLIND 1,991,500

MACHINE TOOL AND ATTACHMENTS THEREFOR Filed April 6, 1932 5 Sheets-Sheet 3 J66 v ]Z2' Feb. 19, 1935. EKLIND 159 91500 MACHINE TOOL AND ATTACHMENTS THEREFOR Filed April 6, 1932 5 Sheets-Sheet- 4 Feb. 19, 1935.

H. A. EKLIND MACHINE TOOL AND ATTACHMENTS THEREFOR Filed April 6, 1932 5 Sheets-Sheet 5 I I J Jig/2 2 59 122 50 6 1945 J50 J76 J50 J J3, A-za 164? Z76 J72 I74 EWL I 2% 6 fi Patented Feb. 19, 1935 E TA?! E's-1 iBATE YT -E- 7 i P 9 0: 1i i I meme root simmers, e I

'.1.HBEFQR:.-

' HenningAfEklind, 'ChicagoQIll. V, g H Appeasement 61 32'; 'fsesal' uqieoifin' L Y siew e" My invention relatesto-machine-tools and more particularly, to attachments therefor.

An object of my invention-is lthe provision or" an attachment for a machine tool whichcarries its own motor and is adapted ,to -performefine, close work, which the machine ':tool on .which "it is mounted is not designedtc'perform hni i A further object of my invention is thefprovision of anauxiliary machine-tool for mounting on a milling machine, lathe,. or:,the like;.which carries its own motor and ,ise- 'adaptedetonbe mounted on the'milling machine and usedin conjunction with the-work table of'the latter.

A further objecteof my invention is the-provision of a machine tool arranged for'mounting on a milling machine or the like which carries its own .motor, is adapted for-driving ,attool, at a plurality of speedsand is arranged to befswung at any angle to the work .so asito perform line accurate operations on dies, fixtures and, the

like.

A further vision of an auxiliary machine tool, for, mount? ing on machine tools such as milling zmachinels, lathes, and the like, whichis supported 'iIDfIlgfihQ machine on which it is mounted' insuch manner that the pointof support is close tcthe w,o1" l;;,-.

whereby the auxiliary tool Willab more rigid and be capable of'performing more accuratevvor-k A further object of my invention is the pro vision of an-auxiliary; tool which may ,be driven at any one of a plurality of speeds by means of belt'and cone pulleys, and the provision of means for lockingone of the pulleys, whereloythe tool maybe more easily removedand the provision of means for changing thepositionof one of the cone pulleys whereby additional cutting tool speeds may be obtained.. v I r A iurtherob'ect of my invention is the pmvision of an auxiliary tool for mounting ,on a machine tool, which is provided with an improved and simple means of holdingacutting :tool

, .A further object is -to provide a machine tool in whichthe cutting tool may easily be set a lang-e variety ofgclifferent jpositihns at any de .siized angle.-- t 1 A further object is to provide an improved means .for preventing operation; of the ,mdtor switch when-the mechanism is not in, condition for operation. v V, v 5

Other objects and advantages will he more ape parent from an understanding of the specifications taken in connection with the drawings, .in which r t Figure 1 isai-ViBW 9f arnachine toolhaving my auxiliary tool mounted thereongm; 1

Figure .2 is, an enlarged 1 view of, my improved auxiliary 13001;? t g a .g Figure Slis a view taken isubstantiallyion line 3'--' 3'of-:Fi.g 11re 1; i

r l y-11 object .of my invention isitheflprc taken substantially on the line 4--;4 of Figure 3; .t L .1.

Figure 5isa view showingmyfmethod of looking a conepulley; r Figure 6 is a viewshowing an alternate means of mounting my auxiliary tool on am'achine tool; Figure; .isa view showing an alternate means ofimounting myauxiliary tool .on a machinetool havingla different type of supportarm; -Figure' 3 is aview taken substantially ,On the line,.8 -S;of Figure 2;

Figure 9 is :a ,view taken line 9-9 oiEignre 3; -.Figure lfliisalviewi showing my improved cuttingltool holding means; 1 l 1 a. Eigureell .is a plan View of the tool holder shown ,inlFigure 10; v I r lFigure' 12 is ajragmentary elevation oi aperhonor the machine illustrating a modified motor Icontrol switch;- r ,r;- 1 i r l Fi ure 1315a fragmentary sectional v ew-take on;thej.line 13,-"-,13jof Figure 12; Figure 14 is a vertical sectional viewtaken on theline' .l414 of Figure 13,; and. Figure 15' is a perspectiveview of the switch lock" 5 r I v ,zlBriefiy; 'rnv ention on mp a e the DIQ- -vision of ,a self-contained auxiliary tool 1 2, arranged-to be driven'byits own motor 14 supvported. rom and secured to the auxiliary tool 12. JIfhe .auxiliarytool may be rn'ountedand supported groin any type of machine "tool in any suitable manner and, as shown in. the drawings, issup- IJ .,1"ited i'from' 'an arm 16 projecting from-amachine tool 13. .I'he machine tool on which the auxi iarv ol" '2 i m nt d a -b an type of ,maph a uqhasi o di a l u edi a machine shop, as for example, alathe, boring mill, millmg machine, etc. The :machine toolshown in the drawings is amill-ing machine and comprises ahaSe ZO, a supporting column 22, a work table 24, and the usual means designated generally by the number 26 for, controlling the opera- .tions, of the imilling machine 5 Figure 4a is a view aontal type inwhich the table 24: maybe driven in either a horizontal or a vertical plane while the position of ItheIcutting tool remains statione beused iorthe plain milling operations, and the substantially on the M V The milling' machine shovvnin the drawings is of the ho'riall more unusual operations then performed by the -auxiliary' tool without. removing the zw ork,t =idie, or;fixturebeing made 'from the-machine. The attachment thus makes it unnecessary to remounttnework in? ma a l p -te m,-

tions are completed, may be Wise be performed.

I provide an auxiliary tool for performing these drilling, reaming, or accurate cutting operations which may be mounted on the machine tool, used to perform operations for whichthe machine tool is'n'ot adapted and which, after the fine operarotated out of cutting position or. entirely removed from the machine tool so as not to interfere with operations of the latter. g I 1 In Figure 1 my auxiliary tool is shown performing an operation on a piece of work 28, which is mounted in the usual ways provided in-the table 24. The auxiliary tool 12.is mounted on the arm 16, by means of a split collar 30 which fits over the arm 16. The splitportions of the collar 30. are drawn together by means of anut and bolt assembly 32, so that the auxiliary tool 30 maybe secured to thearm 16 with a high degree of rigidity.

The collar 30 has a depending flange portion 34 which is reinforced by depending ribs 36. The depending flange 34 of the collar 30 is circular in shape, and has a plurality of apertures 38, each adapted to'receive a bolt 39. The tool 12 has a housing or casing 40 and there'may be cast integral with the casing 40 a flange42, partially circular in shape and the circular portion of which is of-the same diameter as the depending flange 34. The faces of the two circular flanges] 34 and 42 are finished so as to form comple-.

mentary bearing surfaces and the heads of the bolts 39 project into a circular T shaped slot 44 providedin the flange 42. The two flangesare secured by nuts 46 on bolts 39 and if desired there may be provided washers 45. Upon loosening the nuts 46, the auxiliary tool may be rotated about the depending flange 34. v I

The depending flange 34 may be provided with a zero mark 47 and the circular flange 42 may be graduated around its circumference sothat when the auxiliary tool 12 is in a vertical position the zero mark 'on the graduated portion willbe in registry with'the mark 47 on the flange 34. The

markings on the circular portion 42'are prefers ably in degrees so that the displacement of the auxiliary tool from the vertical may be conveniently read in degrees. After the tool has been set at the desired angle it is rigidly secured in this position by means of the nuts 46. The outer surface of the casing 40 has a plurality of planed, true surfaces 49 so that the zero mark on the angle indicating'dial may be checked occasional- -ly:to see that the auxiliary tool is actually in a vertical position with respect to the table when the two zero marks are in registry. r

The type of mounting described adapts the tool 7 for rotation through 360 in one plane. If desired the means for mounting the auxiliary tool may be modifiedso that the tool may be rotated in all directions as shown in Figure 6,'wherein the collar 30 instead of being mounted directly onzthe arm 16, is mounted onthe arm 16 through an auxiliary arm 48. The auxiliaryarm 48 may be formed integrally with a clamping means 50 which is adapted to be secured to the arm 16 by means of a bolt 52. By this method of mounting, the auxiliary tool may be rotated in two planes namely around the arm 16 and around the depending flange 34.

Internally of and concentric with the casing .ate with corresponding enlarged portion at'56 and assembling the tube 54 is pushed up in the casing 40 until the'enlarged portion 56 abuts against the end of the casing 7 40. The upperportion of. the tube 54 is threaded at 58,.and a retainer ring 60'is'threaded on the 1 tube 54 until it abuts against the upper portion provided with spanner wrench holes at 61 or with any other convenient means of drawing the retainer ring down tightly against the end of the casing. A cap 62 having a large central aperof the casing 40. The retainerring 60 may beture is threaded on the projecting portion of the;-

tube 54 and between the cap tube-there is inserted packing 63.

Concentric with the tube 54, there is mounted a spindle orrotatable element-64, internallyiof and the end of the which there is provided a pull rod 66 rotatable with the spindle 64. The upper portion of the spindle 64 is rigidly spaced from. the tube54 by means of bearings 68 and'70, and thelowenpor tion of the spindle 64is spaced from the tube 54 by means of bearings 72 and 74. The upper bearings 68 and 70 maybe spaced from. each f other by means of a washer76 and the inner races of the: bearings are fixed to. thespindle 46 and rotate therewith;

The diameter of the spindle 64 is decreased a the lower bearingformingan abutment 78-on which the inner race of the bearing 70 rests. The upper portion of the inner race of the bearing 68;

is held in position by means of a collar 80, heying'a depending portion' 82 The spindle '64 is] threaded at'84 and the collar fits inthe central aperture formed in the cap 62 and is drawn down so that the inner races of the bearings. 68, and '70 are confined between the abutment 78 and the'end of the collar 82. The outer races of the bearings 68 and 70 are unconfined so that a. cer

tain amount of vertical play is allowed; The

inner race of the lower bearing 74 abutsagainst an enlarged portion 86 of the spindle 64, and the inner race of the upper bearing 72 is conflnedso that there is no-vertical play inthe bearings'by means of 1a collar 88 which is threaded on the spindle 64. If desired, the collar 88 may be provided with a lead disc and'set screw 92, so that the collar willbe held securely in position. The

internal diameter of the tube 54 is increased at. the bearing 72 to-provide an abutment for the outer races of the bearings while the lower .;end' of the tube 54 is threaded at 96.an'd a retainer ring 98 is drawn up flush with the lower bearing 7 74 so that the outer races are also restrained from vertical movement Below the-bearing 74 and around the spindle 64 and rotatable therewith, there is secured an oil ring 94. a V

There is also secured by means of the threads 96, a collar 100, provided with a packing 'groove 102. In the upper portion of the spindle collar 100, there is provided a shallow depression 104, so that oil flowing downwardly through the bearings 72 and '74, and thrown outwardly by the oil' ring 94, will drop into the shallow depression 104. T

This provision together with the packing ring 102 prevents o il thespindle. Y

Concentric with the spindle-64 and-internally thereof, there is a cutting tool holder piece'or collet 106 held in place by means of threads on the lowerend'of the threads 107 formedintera nally of the collet. The lower portio'n'of thefc'ollet 106 is, slotted to form a plurality of fingers 108, preferably three in number while the/lower and outer circumference of the'collet' 106 118 from dripping from the end o1.

pull rod 66 which cooper V is held against rotation usual type when the locking piece 166 is positioned in one of the apertures 164 of the cone pulley 122.1 Inasmuch as most of the parts disclosed, in Figures 12 to 15 have been, previously described, similar reference characters have been applied to similar parts. The locking piece 166 is formed integral with a relatively long rod 200 which is, of course, longitudinally slidablev inthe casing 40, being operated by rotation of the shaft 176, as previously described. The rod 200 has a transverse slot 202 formed near its lower end to receive the channelshaped extension 204.01" an interlocking member 206, which is preferably formed of a sheet metal stamping. The motor switch 208 is mounted withina suitable recess formed in the casing 40 by means of ,a plate 210,v the switch being of the having a pivotally mounted finger piece 212. When this finger piece is in its lowermost position, as shown in Figure 13, it is in its on position. The interlocking member 206 has an-aperturedsidewardly extending flange 214., which lies in front of the switch208 and through the aperture of: which .the finger piece 212 projects, The flange 214 has aprojecting lug 216 which lies beneath the finger piece 212 and is adaptedto engage the latter. When the locking piece 166 is in its uppermost positionwithin the socket 164 of the cone pulley 122, the projecting lug 216 will be raised from the position in which it was shown in Figure13 sufficiently so that it willbe impossible to swing the finger piece downwardly to switch on the motor. This interlocking mechanism thus prevents the possibility of burning out the motor due to an inadvertent at= tempt to start the motor when the cone pulley by means of the locking this interlocking mechanism piece. Similarly,

will prevent the operator from inadvertently raising the locking piece 166, for if he applies sufiicient force to raise the locking piece the motor will automatically: be switched off, since the projecting-lug 216 will engage thefinger piece 212 and swing the latter to its off position.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is: u

1. In combination a machine tool and an auxiliary tool adapted to be mounted on said machine tool comprising a casing, a rotatable element in said casing, a motor for driving said rotatable element, a pair of cone pulleys, onersecured to said rotatable element and one secured to the shaft of said motor, and adjustable means for supporting said motorupon saidcasing in one of two positions of adjustment, whereby the cone pulley attached to said motor may be translated relative to the other of said cone pulleys.

2. In a machine tool having an auxiliary tool mountedthereon,-independent driving means for said auxiliary tool, a pair of cone pulleys for transmission of power from said independent driving means to said auxiliary tool, andrmeans for restraining one of said pulleys from rotating, comprising a locking'bolt having ,a slot therein, a shaft, and an eccentric projection on said shaft engageable in said slot upon rotation of said shaft. a

3. In combination with a machine tool, an auxiliary tool arrangedto be mounted on said machine tool, a separate driving element for said auxiliary, tool, means to control the operation of said driving element, meansfor looking a normally moving part of said auxiliary tool'against movement, and interlocking means operable to prevent operation of said control; means when said locking means I is in operative position. V 4. In a machine of the class described;the combination of a collet, an electric motor for rotating said collet, a motor and said motor, a lock stationary, and. said switch. i, v 5. In a machine tool having a projecting arm,

collet, a switch for-controllingsaid to, hold said transmission means and an interlock between saidilock,

power .transmission'jbetweensaid 1- an auxiliary tool therefor, said auxiliarytool comprising a casing, a motor andspindle'secured to said casing, amounting bracket secured I tofsaid casing for adjustable rotation relative thereto, said mounting bracket .being'provided' and a mounting element" with a clamp socket, h V having'means for securing it to'said arm in any one of a plurality of angular ,positions, said'ele-.

ment having a cylindrical projection normal-to a manually rotatable shaft, the axis of which is perpendicular to the axis of said bolt and laterally displaced from the axis thereof; and an eccentric projection on the end of said shaft, said projection being engageable in the slot in said bolt to shift the latter gagement with one of the apertures in saiddriven pulley upon rotation of said shaft- 1" 7. Incombination, a machine tool; an auxiliary tool supported uponsaid machine tool,a mam able cutting-tool receiving. element in said aux iliary tool, a motor carried by saidauxiliary tool for driving said rotatable element, said motor being movable withlsaid auxiliary tool 'asthe'i.

latter is set up for tions, driving means different. machining operafor transmitting power from a driving pulley and a longitudinally into locking en sliding locking bolt having its end said motor to said auxiliary tool at any one of'a and means forrotatably ad justing the positionjof said auxiliary tool with plurality of speeds,

means includinga and an: adjustable pivotal connection between the auxiliary tool and the'clan'ip, ing its axis eccentric of the axis of saidclamp. I

8. In. a machine tool, a rotatable element; a motor for driving said rotatable element, a driving pulley element, a belt cooperable Withsaid pulleys for transmitting power from saidmotor tosaid to.- tatable element, each: of said pulleys having a plurality of cooperating belt receiving grooves'of different diameters providing means for driving said rotatable element at a plurality of different speeds, means for. adjustably positioning one of said pulleys in a laterally displaced position with respect to the other of said pulleys such that a plurality ofbelt receiving grooves of one of the pulleys will be in alignment with different grooves respectively on the other of an additional series of speeds for said element will be available; -L

" HENNIN G'A EKLIND;

secured to the rotating partbfsaid. motor, .a driven pulley secured tosaid rotatable said pulleysj-whereby respect tosaid machine tool, said last named V rotatably adjustable clamp'toi'; securing the auxiliarytool'to saidmachine tool, 1'

the latter .hav- 

